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2003

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Articles 3331 - 3338 of 3338

Full-Text Articles in Physical Sciences and Mathematics

Scas Officers And Council Members 2003 - 2004 Jan 2003

Scas Officers And Council Members 2003 - 2004

Journal of the South Carolina Academy of Science

No abstract provided.

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Use Of Multi-Scale Phase-Based Methods To Determine Optical Flow In Dynamic Scene Analysis, Robert Hastings Jan 2003

Use Of Multi-Scale Phase-Based Methods To Determine Optical Flow In Dynamic Scene Analysis, Robert Hastings

Theses: Doctorates and Masters

Estimates of optical flow in images can be made by applying a complex periodic transform to the images and tracking the movement of points of constant phase in the complex output. This approach however suffers from the problem that filters of large width give information only about broad scale image features, whilst those of small spatial extent (high resolution) cannot track fast motion, which causes a feature to move a distance that is large compared to the filter-size. A method is presented in which the flow is measured at different scales, using a series of complex filters of decreasing width. …

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Wavelet-Based Simulation Of Geological Variables, T. T. Tran Jan 2003

Wavelet-Based Simulation Of Geological Variables, T. T. Tran

Theses: Doctorates and Masters

This thesis introduces a number of conditional simulation algorithms using wavelet bases. These make use of two orthogonal wavelet bases, the Haar and the Db2 bases. Firstly, two single-level algorithms are introduced, HSIM: with the Haar basis and DB2SIM with the Db2 basis. HSIM reproduces the histogram and semivariogram model of isotropic samples but not the semivariogrnm model of anisotropic samples. DB2SIM reproduces the histogram and semivariogram model in both the isotropic and anisotropic cases but, because of the conditioning method employed, is not as computationally efficient as we would wish. Because of the limitations of HSIM and Db2SIM two …

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Geostatistical Optimisation Of Sampling And Estimation In A Nickel Laterite Deposit, Mark P. Murphy Jan 2003

Geostatistical Optimisation Of Sampling And Estimation In A Nickel Laterite Deposit, Mark P. Murphy

Theses: Doctorates and Masters

Nickel and cobalt are key additives to metal alloys in modem industry. The largest worldwide nickel-cobalt resources occur in nickel laterite deposits that have formed during the chemical weathering of ultramafic rocks at the Earth's surface. At the Murrin Murrin mine in Western Australia, the nickel laterite deposits occur as laterally extensive, undulating blankets of mineralisation with strong vertical anisotropy, near normal nickel distributions, and positively skewed cobalt distributions. The mineral resources in nickel laterite deposits in Murrin Murrin are usually estimated from drilling and sampling on relatively wide-spaced drill patterns that are supported by local clusters of close-spaced sampling. …

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A Drop In The Bucket: Collective Efficacy Perceptions Affect Waste Minimising Behaviours, Leesa N. Bonniface Jan 2003

A Drop In The Bucket: Collective Efficacy Perceptions Affect Waste Minimising Behaviours, Leesa N. Bonniface

Theses: Doctorates and Masters

The goal of this thesis was to inform a social marketing effort designed to increase environmentally friendly behaviours in an effort to ensure a more sustainable future. This study attempted to gain a better understanding of the discrepancy that exists between pro-environmental concerns and pro-environmental actions by exploring efficacy perceptions. Efficacy beliefs were compared for three groups of individuals: 1) environmentally active/members of an environmental group; 2) environmentally active/not members of an environmental group; 3) environmentally inactive and not members of an environmental group. Six focus groups were conducted and interviewees were recruited from the Earth Carers' organisation and the …

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Use Of Date Pits As An Energy Source For Nile Tilapia, Oreochromis Niloticus, Maitha Mohammed Sultan Al-Darmaki Jan 2003

Use Of Date Pits As An Energy Source For Nile Tilapia, Oreochromis Niloticus, Maitha Mohammed Sultan Al-Darmaki

Theses

The present study was conducted to evaluate date pits as an energy source of Nile tilapia fingerlings and adults, in two consecutive experiments. In the first experiment, five isocaloric (450 kcal/100g)-isonitrogenous (35% crude protein) diets containing of date pits as a replacement for wheat bran (energy source) 0, 25, 50, 75 and 100% levels were prepared. The diets were fed to duplicate groups of Nile tilapia, Oreochromis niloticus fingerlings and adults, with average initial weights of 10 and 50g, respectively twice a day, for 70 days. The culture system consisted of 70-L, fiberglass tanks connected together in a closed system. …

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Development Of An Expert System Tool For Environmental Impact Assessment, Raed Mohamed M. Al Marzouqi Jan 2003

Development Of An Expert System Tool For Environmental Impact Assessment, Raed Mohamed M. Al Marzouqi

Theses

In this study, approaches to environmental impact assessment are reviewed and discussed. An expert system tool has been developed via the use of Microsoft Access tool for data management and Visual Basic programming for decision-making. Policies and regulations included in the program are based on the Technical Guidelines # 4 of the Dubai Municipality. The salient features of the program can be summarized as follows: the program allows the EIA applicant to input all the necessary information about his/her company and its activities. All discharges to air, water and land are compared with TG # 4 and status report is …

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Impact Of Reject Brine Chemical Composition From Inland Desalination Plants On Soil, Juma Bin Khalfan Bin Khamis Al-Handhaly Jan 2003

Impact Of Reject Brine Chemical Composition From Inland Desalination Plants On Soil, Juma Bin Khalfan Bin Khamis Al-Handhaly

Theses

The impact of reject brine chemical composition and disposal from inland desalination plants on soil in the eastern region of Abu Dhabi Emirate, namely Al Wagan, Al Quaa and Urn Al Zumool, was evaluated. Twenty five (25) inland Brackish Water Reverse Osmoses (BWRO) desalination plants (11 at Al Wagan, 12 at Al Quaa, and 2 at Urn Al Zumool) were investigated. The average capacity of these plants varied between 26,400 G/d (99.93 m3/d) and 61,000 G/d (230.91 m3/d). The recovery rate varied from 60 and 70% and the reject brine accounts for about 30 - 40 …

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